Color cast, noise, and motion blur in a camera are usually the result of multiple factors combined, and do not necessarily mean the module itself is damaged. To address these issues, it is best to start with the simplest checks and then go deeper step by step.
Color cast is often related to the white balance algorithm being disturbed by ambient light. For example, under mixed light sources (fluorescent light plus natural light), the module may fail to determine the color temperature accurately, causing the image to appear bluish or yellowish. You can try fixing the white balance parameters or adjusting the type of lighting in the shooting environment. If the color cast only appears at certain angles, check whether there are reflections or coating scratches in front of the lens, as such physical damage can also cause local color abnormalities. In addition, poor contact of the ribbon cable can cause signal transmission deviations. Replugging it and cleaning the gold fingers is a low-cost and effective verification method.
Noise is mostly related to insufficient signal-to-noise ratio of the image sensor. In night shots or low-light conditions, noise increases noticeably, which is a physical characteristic of all image sensors and cannot be completely eliminated. The approach is to prioritize light intake: increase the aperture, reduce the shutter speed (beware of camera shake), or add supplemental lighting. If these conditions are limited, consider algorithm-based noise reduction, but be aware that excessive noise reduction sacrifices detail and produces a "painterly effect." Also, check whether the ISP (image signal processor) gain is set too high. Sometimes manually limiting the ISO to a reasonable range can significantly improve image cleanliness.
Motion blur occurs when the subject moves during the exposure time. If it is motion blur of a moving object, prioritize shortening the exposure time and increasing the shutter speed. Even if it means sacrificing a bit of ISO, it is usually more acceptable than blur. If the entire frame shows directional blur, it may indicate that the module's stabilization has failed or the driver mechanism is abnormal, so check whether the lens motor is stuck. Another special case is when the ambient temperature is too low, causing the liquid crystal or sensor to respond slowly. In such cases, the issue usually resolves automatically once the device warms up.
For such problems, the worst thing to do is to blindly disassemble the module or randomly adjust firmware parameters. It is recommended to first record the specific scenario where the issue occurs (light source type, subject speed, ambient temperature), and then adjust the shooting strategy accordingly. If all software and hardware settings are confirmed correct and the problem persists, then consider repair or module replacement. In many cases, a camera that seems "broken" simply needs to work under the right parameter configuration.